Door Intercom


Posted on Feb 6, 2014

Door intercom is very useful for home security. If you receive a door knock or door bell/alarm, you can push this intercom knob and ask the guest? to identify.


Door Intercom
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Signal Generator 20KHz
    Audio Function Generator
    4 x 25 W Car Amplifier TDA7381 Circuit
    Fundamentals of Transistor Oscillators
    P8 CPU Documentatio Hardware
    Tachometer Circuit Using LM2907 LM2917 Frequency to Voltage Converter
    function generator using icl8038
    atmel isp
    simple steps for making fm transmitter
    Audio Oscillators
    PC Controlled RC Car
    Eight PTC phase asynchronous motor protection circuit



    Top